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ra1l [238]
4 years ago
13

Question 3

Mathematics
1 answer:
Alborosie4 years ago
4 0
A) Substitution
substitute y = 5x-2 for y in the first equation and solve for x:
5x-2 = 7x-8 subtract 7x from both sides
-2x-2 = -8 now add 2 to both sides
-2x = -8 + 2 simplify
-2x = -6 divide both sides by -2
x=3
Now substitute x with 3 in either equation
y=5x-2 =5*3-2 =13 
(3,13)
B) (3,13) is the point where the two lines intersect
y=mx+b is the equation of a line
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3x = 27 + 3y<br> 3x - 10y = 27<br><br> please explain how you got the answer.
Vedmedyk [2.9K]

Answer:

Hi there!

Your answer is:

Y= 0

X= 9

Step-by-step explanation:

3x=27+3y

3x-10y=27

Solve one of them for Y

I chose the first equation

3x=27+3y

-27

3x-27=3y

/3

x-9 = y

NOW, plug y in the second equation!

3x-10y=27

y= x-9

3x-10y=27

3x-10(x-9) = 27

Solve for x!

3x-10x+90 = 27

-7x + 90 =27

-90

-7x = -63

/-7

x= 9

FINALLY, plug back in x for y equation

y=x-9

x=9

y=9-9

y=0

3 0
3 years ago
If 10 people can paint a fence in 3 days, how long would it take 6 people?<br>​
Neporo4naja [7]

Answer:

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Step-by-step explanation:

people:days

10:3

6:5

10/6 = 1.66666.....

3× 1.66666...... = 5

4 0
3 years ago
Read 2 more answers
Which real number is not both a whole number and an integer? A. 18 B. 43 C. 0 D. −229
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A negative number is not considered a whole number...so ur answer is -229
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75 pins of juice in 5 containers find the rate and unit rate
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Answer: 15 juice pins per container

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=

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1 Container

=

15 Juice pins

1 Container

= 15 Juice pins per Container


4 0
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Step-by-step explanation:

6 0
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